thats more of what i was wondering, i have PC's on my 55 and im getting a lot of growth, but i was wondering like at what point do you know when to make the jump to more intense lighting. is there a specific watts per gallon? or is there a lot of things that come into play, such as not only how many gallons, but also depth, temperature, stuff like that? is it possible to have too much lighting? if so, how much is too much?